Hi, I have a question for videomakers. Notwithstanding that I do not understand anything about video because I have always only taken pictures. I read that the shutter speed must be double compared to the fps (30fps then 1/60). Now my question is: after calculating the filter to be mounted on the camera to reach the correct exposure, in a scene where the light changes constantly how do you always maintain 1/60? Can you also go up and down a little as a schedule or is it not recommended? Thank you and sorry for ignorance.